As 2/3 of the iron needed for blood production in children before the age of 2 comes from the mother, iron deficiency in the mother will definitely affect the child. Clinically, it has been found that many children born to mothers who are delicate during pregnancy and have a simple food composition have more serious disadvantages. Because iron is very closely related to cellular immunity, children with iron deficiency have poor cellular phagocytosis of bacteria, slow movement to lesions, and varying degrees of reduced immunity, and are prone to colds, pneumonia, or diarrhea, and frequent hospital visits. Therefore, the mother must face the problem squarely and the food composition must be complicated. In particular, it is important to eat more foods that are relatively rich in iron, otherwise it can affect the growth and development of the child later on, leading it to suffer from more diseases.